This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100AX325, with the same bore, stroke, output force, port and mounting, so it fits the same application. The SAI replacement keeps the same ISO 15552 mounting interface, bore, stroke, output force and accessories, so it drops straight into existing fixtures. It is the current-production version of this cylinder with an upgraded piston seal.
Airtac SI100 Standard Cylinder SI100AX325
The AirTAC Airtac SI100 Standard Cylinder SI100AX325 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 325mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100AX325, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke325 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100AX325
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SI100 Standard Cylinder SI100AX325
The AirTAC SI100AX325 is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore and 325mm stroke. It delivers 3927 N push and 3681 N pull at 0.5 MPa through a G1/2 port. The direct replacement is the SAI100AX325, matching the bore, stroke, force, port and ISO 15552 mounting interface for existing fixtures.
The SAI upgrade features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life. This SKU has an SUS420J2 stainless steel rod (option A) but lacks a magnet, so it cannot take a CS1-B/DS1-B sensor. For load holding, the SAI family adds SAIL and BSAI lock variants the SI lacked.
Airtac SI100 Standard Cylinder SI100AX325 Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100AX325 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100AX325 |
| Bore size | Ø100 mm |
| Stroke | 325 mm |
| Acting type | Double acting |
| Port size | G1/2 |
| Rod thread | M20×1.5 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 800 mm/s |
| Cushion | Adjustable, 36 mm |
| Max standard stroke | Up to 1500 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAI100AX325 carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø100mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 3927 N | 3682 N |
| 0.7 MPa | 5498 N | — |
| Max (@1.0 MPa) | 801 kgf | |
The SAI100AX325 produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SI100 Standard Cylinder SI100AX325
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×325 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Legacy SI-family variants: SID (double rod), SIJ (adjustable stroke) — each maps to its SAI equivalent (SID→SAID, SIJ→SAIJ). Rod material: carbon steel (blank) / SUS420J2 (A) / SUS304 (B).
Where the Airtac SI100 Standard Cylinder SI100AX325 Is Used
Heavy-Duty Pressing
Drives large forming or stamping tasks requiring 3927 N of push force at 0.5 MPa, utilizing the 325mm stroke to cycle heavy tooling.
Pallet Handling
Indexes loaded pallets on conveyors where the 100mm bore and SUS420J2 stainless rod provide the necessary thrust and moisture resistance.
Material Lowering
Lowers heavy fixtures with controlled deceleration using the 36mm adjustable air cushions, requiring external guides for the 325mm extension.
Replacing the Airtac SI100 Standard Cylinder SI100AX325 with the SAI100AX325
To replace the SI100AX325, order the SAI100AX325. Verify the ISO 15552 mounting interface, 325mm stroke, G1/2 port, and SUS420J2 stainless rod. Because this is a no-S SKU, it cannot accept a magnetic switch; use external sensing if needed. For sizing, a neighbouring 80mm bore yields 2513 N [email protected], while the 125mm bore yields 6136 N. At 325mm stroke, use external guides to prevent rod-bending side loads. The air cushion only decelerates; it does not hold load on air loss. For secure holding, use an external pilot check valve or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100AX325
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SI100 Standard Cylinder SI100AX325 FAQ
Yes, the SI100AX325 is discontinued. The direct replacement is the SAI100AX325. It is dimensionally interchangeable per ISO 15552, retaining the same 100mm bore, 325mm stroke, 3927 N force, G1/2 port and mounting interface.
This 100mm bore cylinder uses a G1/2 port. The force output is 3927 N push and 3681 N pull at 0.5 MPa, 5497 N push at 0.7 MPa, 7068 N push at 0.9 MPa, and a theoretical maximum of 801 kgf at 1.0 MPa. It operates at 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100AX325
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100AX325 replacement — usually within 7-8 hours.